IS 17772 : Part 2 : 2022/ISO 10322-2 : 2016 Ophthalmic Optics-Semi-finished Spectacle Lens Blanks - Part 2 Specifications for Progressive-power and Degressive-power Lens Blanks

New Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 2) which is identical with ISO 10322-2 : 2016 ‘Ophthalmic optics — Semi-finished spectacle lens blanks — Part 2: Specifications for progressive-power and degressive-power lens blanks’ issued by the International Organization for Standardization (ISO) was adopted by Bureau of Indian Standards on recommendation of the Ophthalmic Instruments and Appliances Sectional Committee and after approval of the Medical Equipment and Hospital Planning Division Council.

This Indian Standard is published in two parts. The other part in this series is:

Part 1 Specifications for single-vision and multifocal lens blanks

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.